import java.util.ArrayList;
import java.util.LinkedList;
import java.util.Queue;
import java.util.Stack;

public class TestDemo {
    public static void main(String[] args) {
        int count = 0;
        int num1=0,num2=0,num3=0,num4=0;
        ArrayList<ArrayList<Integer>> arrayLists = new ArrayList<>();
        ArrayList<Integer> arrayList = new ArrayList<>();

        LinkedList<Integer> list = new LinkedList<>();

        Stack<Integer> stack = new Stack<>();

        Queue<Integer> queue = new LinkedList<>();


    }
}
